30221212121 has 4 divisors (see below), whose sum is σ = 30262107600. Its totient is φ = 30180316644.

The previous prime is 30221212117. The next prime is 30221212187. The reversal of 30221212121 is 12121212203.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 30221212121 - 2² = 30221212117 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 30221212121.

It is not an unprimeable number, because it can be changed into a prime (30221212321) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20446631 + ... + 20448108.

It is an arithmetic number, because the mean of its divisors is an integer number (7565526900).

Almost surely, 2^30221212121 is an apocalyptic number.

It is an amenable number.

30221212121 is a deficient number, since it is larger than the sum of its proper divisors (40895479).

30221212121 is an equidigital number, since it uses as much as digits as its factorization.

30221212121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40895478.

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 30221212121 its reverse (12121212203), we get a palindrome (42342424324).

The spelling of 30221212121 in words is "thirty billion, two hundred twenty-one million, two hundred twelve thousand, one hundred twenty-one".